<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript 字符串（String） 对象</title>
</head>

<body>
    <!-- 字符串的索引从零开始, 所以字符串第一字符为 [0],第二个字符为 [1], 等等。 -->
    <!-- 在字符串中使用转义字符(\)使用引号： -->
    <script>
        var carname1 = "Volvo XC60";
        var carname2 = 'Volvo XC60';
        var answer1 = 'It\'s alright';
        var answer2 = "He is called \"Johnny\"";
        var answer3 = 'He is called "Johnny"';
        document.write(carname1 + "<br />")
        document.write(carname2 + "<br />")
        document.write(answer1 + "<br />")
        document.write(answer2 + "<br />")
        document.write(answer3 + "<br />")
    </script>
</body>

</html>